Update app.py

app.py

@@ -1,5 +1,44 @@
-import streamlit as st
-from transformers import pipeline
+"""
+Hugging Face Spaces: AI Friend Therapist Assistant
+
+This app listens to your messages, flags language that might indicate distress,
+and provides emergency contacts for Canada if needed. It also uses a Hugging Face
+summarization pipeline to generate a brief "therapist summary" of your conversation.
+
+Dependencies:
+  - streamlit
+  - transformers
+  - torch
+
+You can create a requirements.txt with:
+    streamlit
+    transformers
+    torch
+
+Deploy this file (app.py) along with requirements.txt to Hugging Face Spaces.
+"""
+
+# Dependency checks
+try:
+    import streamlit as st
+except ImportError:
+    raise ImportError("Missing dependency: streamlit. Install it with 'pip install streamlit'.")
+
+try:
+    from transformers import pipeline
+except ImportError:
+    raise ImportError("Missing dependency: transformers. Install it with 'pip install transformers'.")
+
+try:
+    import torch
+except ImportError:
+    raise ImportError("Missing dependency: torch. Install it with 'pip install torch'.")
+
+import os
+
+# Optional: display a note if running on Hugging Face Spaces (the SPACE_ID env var is set in Spaces)
+if os.environ.get("SPACE_ID"):
+    st.info("Running on Hugging Face Spaces.")
 
 # Configure the Streamlit page
 st.set_page_config(page_title="AI Friend Therapist Assistant", layout="centered")